<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script src="https://unpkg.com/vue@next"></script>
    <div id="app">
        <todo-item></todo-item>
    </div>

    <script type="module">
        import compA  from './moduleA.js';
        const vueOpt = {
            data(){
                return {
                    
                }
            }
        }

        const app = Vue.createApp(vueOpt);
        app.component('todo-item', {
            data(){
                return {
                    title: 'name'
                }
            },
            components: {
                compA
            },
            template: `
                <div>
                    mainPage
                    <compA :title="title"></compA>   
                </div>
            `,

            mounted(){
                setInterval(()=>{
                    console.log('this.title:', this.title);
                    this.title = this.title + '0';
                }, 1000);
            }
        })

        app.mount('#app');
    </script>
</body>
</html>